I purchased a 5 gallon bucket of pre mixed oils but need to heat it up so the oils are completely mixed before use. Does anyone have any ideas for doing this? I don't have a bath tub (I took it out when I remodeled) but do have a pretty deep kitchen sink.. I tried to fill it with hot water but it didn't quite work although I'll try again but I need a longer spoon or paddle to stir. Any ideas?